Apparatus for hydrating fibrous pulp for the manufacture of paper and cellulose therefrom



Dec. 13, 1927.

H. JACKSON APPARATUS F011 HYDRATING FIBROUS PULP FOR THE MANUFACTURE OF PAPERAND CELLULOSE wnnnnmou Filed April 5, 1925 2 Sheets-Sheet 1 j INVENTUR.

BBC. 13, 1927. 1,652,720 A H. JACKSON APPARATUS FOR HYDRATING FIBROUS PULP FOR THE MANUFACTURE OF PAPER AND CELLULOSE THEREFROM Filed April 5. 1925 2 Sheets-Sheet 2 INVE NTOR. CI/1311i WW 9@\ W Patented Dec. 13, 192?.

UNITED STATES HA BOLD JACKSON, 01' GABSTAN G, ENGLAND.

APPARATUS FOR HYDBATING FIIBROUS PULP FOR THE MANUFACTURE OF PAPER AND CELLULOSE THEREFROM.

Application filed April 3, 1825, Serial No. 30,563, and in Great Britain April 10, 1924.

This invention relates to apparatus for hydrating fibers for paper making or for the production of cellulose therefrom in which the fibers are subjected while wet and mixed with water or other liquid to a rapid but ntle hammering or tappin action by eaters within a cylindrical rib ed casing.

The invention consists in the particular construction of the hammers comprising a rotary beater and their disposition and arrangement around a central shaft within a closed cylinder to form the beater or hydrater.

The invention will be fully described with reference to the accompanying drawing.

Fig. 1 is an elevation of the casing of the apparatus.

Fig. 2 is a transverse sectional elevation showing the disposition of the hammers.

Fig. 3 is a part longitudinal section showing the construction and disposition of the hammers.

Fig. 4 is a perspective view of hammers showing their construction and disposition in relation to one another.

The casing A is a closed cylinder, preferably cast iron, lined with a number of metal laths or bars a preferably bronze, separated by laths or bars a of wood to provide an internal ribbed or barred surface against which the hammers B contact. If preferred the interior of the casing may be formed of a number of flats with re-entering angles or otherwise ribbed or corrugated, or for very fine work it may be smooth or almost so.

The rotor or internal beater is built up of a number of hammers B threaded on to and pivoted u on rods C disposed around a central shaft l') the rods C passing through discs E. The discs E may be keyed to the shaft and are somewhat less in diameter than the internal diameter of the casing A.

In the construction shown the central shaft D is hollow with radial flanges or discs E cast thereon or keyed thereto and drilled with dholes through which the rods are 8888 The hammers B are each made with a cranked arm and with an elon ated boss 6 at one end extending to one si eonly of the arm to give a long bearing and wearing surface on its rod and tapering outwards from the boss with a broad end or flat sole 6 at the free end to hammer or tap the fibers against the wall of the casing A. The hammers B are made right and left hand those threaded on to alternate rods being right hand and those on to the other alternatmg rods being left hand thus they fit more closely together one after the other and are staggered in the line of rotation and overlap one another. The hammers B are preferably made of hard tough bronze as by repeated experiments it is found to give the est wearing results.

The discs E between the hammers support the rods 0 on which the hammers are pivoted and maintain the pulp in close proxim- 1ty to the casing A and prevent any passing through the casing not thoroughly acted upon by the hammers.

The casing at one end is fitted with an inlet pipe a and at the other with an outlet pipe a and the pulp is pumped therethrough in a continuous-flow.

Any degree, of hydration can be obtained by pumping the pulp through two or more machines in succession.

What I claim asmy invention and desire to protect by Letters Patent is pparatus for pulping or hydrating fibers comprising a closed cylindrical casing, metal laths and wooden laths arranged alternately longitudinally of the casing to form a lining therefor, a central shaft within the casing apertured discs keyed thereto, rods passing through the apertures in the discs and hammers pivoted on the rods to contact with the lining of the cylinder each of said hammers being of cranked form with a flat sole and provided with a boss elongated atone side only to enable the hammers orl adjacent rods to be assembled in staggered formation.

In testimony whereof I have hereunto set my hand.

HAROLD Jackson. 

